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House Extension in city

House extension comes with a wide variety of benefits which makes it easy to see why the extension could be a excellent uptick in the possible rate of your property in terms of sales. So if you're seeking to construct a brand-new residence extension however still not convinced about the job, we're below to help you. Being completely mindful any house building and construction work is normally a heavy investment, there's a huge need to be set on your choice before arranging the beginning of any type of job. So are house extensions worth it? Below are a few of the leading benefits provided by house extensions to assist you decide if it's one of the most ideal route for you.

 

What's Involved in Including an Extension?

The steps will differ depending on the range of your extension, however you can anticipate some, if not all, of the below to be included when including an expansion to your home:

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Checking your leasehold contract (if appropriate) to ensure you can do what you wish to do.
  3. Getting an architect  to prepare the plans, considering your planned use ( kitchen area, shower room, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance supplier to let them understand of the planned work ahead of it starting.
  6. Obtaining car parking allows if required for your specialists to ensure they have very easy access to your residential property.
  7. Making sure all intended work drops within permitted allowables.
  8. Clearing the space as well as digging deep into if essential, including the elimination of trees.
  9. Structure job can begin.

 

What is the cost of a house extension in city?

If you're considering adding a 2 floor house extension, then setting a budget for this job would be a wonderful way to start. Similar to a back extension, a 2 storey extension normally leaves the remainder of the building needing some job and also, because of its size, this may imply the re-development of the whole house - which is why they can be very costly. Several of the various other influencing variables that can have large effect on a two storey house extension price consists of: your area, the dimension of the develop, intricacy of the design (anything beyond the standard develop will usually need more know-how and also time), the glazing to be incorporated (the more the glass utilized in the job, the more the product cost), as well as the team used.

Average House extensions cost in Northolt

The regular cost of House extensions are £51,667 in Northolt. Costs vary based upon the materials and the company picked. The upper price range can be as high as £73,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£32,000

Avg. price

Avg. price
£51,667

Avg. price high

Avg. price high
£73,000

£73500

£55125

£36750

£18375

£0

Prices based on actual House extensions costs for Northolt, as reported by local LeadsDoWork members.

House extensions installation cost in Northolt 2026

Labour cost £27,000
Material cost £10,500
Waste removal £2,500
Time frame: 10-14 weeks

House extensions searches in June 2026

House extensions Projects in Northolt in May 2026

1,307

Requests for quotations in Northolt in May 2026

7

Requests for House extensions quotations in Northolt in May 2026. 17% change from April 2026.

50

Requests for House extensions quotations in Middlesex in May 2026. 25% change from April 2026.

Source: Numbers calculated based on the search volumes in major search engines

House extensions searches in cities and towns near Northolt May 2026

11

Requests for quotations in Southall in May 2026

9

Requests for quotations in Uxbridge in May 2026

9

Requests for quotations in Greenford in May 2026

7

Requests for quotations in Hayes in May 2026

7

Requests for quotations in Northolt in May 2026

Northolt

The northwest London town of Northolt is inside the Borough of Ealing and has a population over 40,000. This is a significant increase from 1801, when there were just 336 residents. For all home developments within the Northolt area, you'll want to make use of vetted specialists to get the very best cost for any work you would like concluded.

Looking for House extensions in Northolt?

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House extensions pros in Northolt

Jassi Builders Ltd

2 review(s)
Based: in Hayes, UB4 9YD

Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I have completed all my work on perfect time and leave customers in complete satisfaction. We do all types of loft conversions, exten...

Latest review

Julian F., HP2
4

House Extensions in Hemel Hempstead

No quote received

Dream the Build

19 review(s)
Based: in London, EC1V 2NX

DREAM the Build. Ltd ' Constructing your Vision Making home development exciting, fun and asset building experience , future proofing household & investors Who we are ? Starting fresh in a new country is never easy, but what we did Catal...

Latest review

Patricia Z., SE21
5

House Extensions in London

Great consultation by Catalin Spent a lot of time with us understanding the project and various options.

Tectra Partnership Ltd

1 review(s)
Based: in Slough, SL3 0JE

Latest review

Deepak S., KT10
5

House Extensions in Esher

excellent communication

JPA Building Construction LTD

1 review(s)
Based: in Twickenham , TW1 1AG

Latest review

Rosa S., SE20
5

House Extensions in London

Very nice and helpful unfortunately I am looking for a builder who lives nearby my property

Similar Customer Enquiries for House extensions in Northolt

05 Mar

House Extensions

Northolt - UB5

Enquiry from: Boma F

Start Date: 1 to 3 months

i will like the extension to the kitchen and dinning room to the rear are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have pl...

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04 Mar

House Extensions

Northolt - UB5

Enquiry from: Arusa S

Start Date: Immediate

side double story ext +/- loft conversion

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07 Dec

House Extensions

Northolt - UB5

Enquiry from: Joanna D

Start Date: Immediate

knocking existing diner, garage , small bathroom and laundry room into one open plan area, then create a new child bedroom. creating functional open plan space which includes (bedroom, dining and kitc...

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19 Nov

House Extensions

Northolt - UB5

Enquiry from: Sonata A

Start Date: Immediate

All width extention aprox. 5.1m x 3m

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03 Aug

House Extensions

Northolt - UB5

Enquiry from: Shamal R

Start Date: 1 to 3 months

Homeowner Please contact to appoint

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30 Apr

House Extensions

Northolt - UB5

Enquiry from: Sarah L

Start Date: Less than one month

Are you the property owner: Owner of the property Property Type: Other How many bedrooms does the property have: 3-4 Bedrooms Other Forms: 45 Agreed to recieve quotes for selected products: Yes Pleas...

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05 Feb

House Extensions

Northolt - UB5

Enquiry from: Bilton H

Start Date: Immediate

Rear signal extension Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are you the property owner: Owner of the property Property Type: T...

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08 Jul

House Extensions

Northolt - UB5

Enquiry from: Leighan E

Start Date: Immediate

Are you the property owner: Owner of the property Is the work for domestic or commercial purposes: Domestic Other Forms: 18, 19, 45 Agreed to recieve quotes for selected products: Yes Please call to ...

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06 Jul

House Extensions

Northolt - UB5

Enquiry from: Wole O

Start Date: Less than one month

Are you the property owner: Owner of the property Property Type: Semi detached How many bedrooms does the property have: 3-4 Bedrooms Other Forms: 17, 45 Agreed to recieve quotes for selected product...

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04 Jun

House Extensions

Northolt - UB5

Enquiry from: Raj T

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: We want convert the 3 bedroom to a five bedroom with kitchen

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03 Apr

House Extensions

Northolt - UB5

Enquiry from: Haran S

Start Date: Less than one month

Are you the property owner: Owner of the property Property Type: Semi detached How many bedrooms does the property have: 5+ Bedrooms Other Forms: 17, 45, 35, 16, 96 Agreed to recieve quotes for selec...

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03 Mar

House Extensions

Northolt - UB5

Enquiry from: Mostafa S

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: I have already a 3 meter back extention and looking for an extra 3 meter Ba...

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21 Feb

House Extensions

Northolt - UB5

Enquiry from: Mrs B

Start Date: Immediate

Home owner House Extension Please call to appoint

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19 Jul

House Extensions

Northolt - UB5

Enquiry from: Bader M

Start Date: 3+ months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: A side extension of single story, its approximately 12m by 2.5m this s...

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19 Jun

House Extensions

Northolt - UB5

Enquiry from: Waldemar W

Start Date: 3+ months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: loft extension required Are you the property owner: Owner of the property...

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13 Mar

House Extensions

Northolt - UB5

Enquiry from: Kul S

Start Date: Immediate

Extending on side with small shower, Kitchen, Roof window, move the drainage hole further away, 3 doors, 2 windows, Electrical and plumbing works.

Post a similar request >

24 Feb

House Extensions

Northolt - UB5

Enquiry from: Chris C

Start Date: Immediate

Extension to back of house - 2 storey Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Double storey extension Do you have planning permission: No Would you ...

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07 Feb

House Extensions

Northolt - UB5

Enquiry from: A

Start Date: Immediate

I need to build side extension, 5 meters in length x 235 wide and flat roof

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28 Jan

House Extensions

Northolt - UB5

Enquiry from: Ashis B

Start Date: 3+ months

Home owner Double storey side extension Width=3M Length=7M Roof: Pitched Option 2: Single Storey side extension Same dimensions as above Roof: Flat Full plans and Planning permission in Place...

Post a similar request >

17 Nov

House Extensions

Northolt - UB5

Enquiry from: P P

Start Date: Immediate

Home Owner Single Storey Extension Customer Requires Assistance with Plans and Planning Permission Please Call to Appoint *

Post a similar request >

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FAQs

Can an extension add value to my home?

Yes. Most extensions will add substantial value to your home, and you may find that the extension adds more value than it cost. However, it’s important to be sure that the home remains balanced. Extending your garage and leaving your property with no parking spaces, for example, may impact your ability to sell.

when do you need planning permission for a house extension?

If you’re planning on adding a house extension to your property, you’d probably be worried about whether or not your proposed extension would require a planing permission. Well, it may be relieving to know that not every house extension project would require a formal consent, and in fact, several extensions are covered by the permitted development rights. Not only can this save you a considerable amount of time especially at the project’s planning phase, but it’ll also save you money on the application fee. In the UK, single storey extensions to the house’s rear can be 3 metres deep for both semi detached houses and terraces or 8 metres deep for detached homes.

So how do you know when you’d require a planning permission for your home extension? Well, if your extension plan fits these criteria explained below, then your project is most likely going to be allowable as a permitted development.

• Extensions, which includes previous additions, must not go beyond half of the original house’s total surrounding land area.

• The main elevation, or side elevation where it fronts the highway, must not be extended forward.

• For single storeys, the rear additions must not extend more than the original house’s rear by more than 3 metres in both semi attached homes and terraces (4 metres for detached houses).

• Extensions to the side must be a single storey with a height not exceeding 4 metres and not going beyond 50% of the original house’s width.

• Extensions hat within 2 metres of a boundary should have a eaves height not more than 3 metres.

• Multi storey addition must not extend beyond the original house’s rear wall by a maximum of 3 metres or 7 metres of the boundary opposite the rear wall.

• Permitted development rights do not apply in listed buildings or designated areas.

how much does a two storey house extension cost?

If you’re considering adding a two storey house extension, then setting a budget for this project would be a great way to get started. Similar to a rear extension, a two storey extension usually leaves the rest of the building needing some work and, due to its size, this may imply the re-development of the entire house - which is why they can be very costly. Some of the other influencing factors that can have big impact on a two storey house extension cost includes: your location, the size of the build, complexity of the design ( anything beyond the standard build will normally require more expertise and time), the glazing to be incorporated ( the more the glass used in the project, the more the material cost), as well as the team used.

Generally, when it comes to extensions, the major part of the expenses will be made on the build of the project. This is because it doesn’t only cover the material cost but also the contractor’s overhead as well as the daily rates. At this stage, the extension prices can be determined by the standard of the work that’s being done.

For a fairly average room size of about 18 square metre, the two storey extension should cost within the range of £2,500 to £3,000 per square metre - with the range being determined by the finishes incorporated. Therefore, a two storey extension of about 18 square metre should cost within the range of £45,000 to £55,000. However, this is with the assumption that there are standard window sizes, bathroom suits are modest, and without any need for any purpose joinery or glazing. If you wish to include all these extra features you’ll also have to pay more to make the total cost between £70,000 to £80,000.

how much value does an extension add to your house?

Are you interested in extending your home to create more living space? If yes, then you’d probably want to know how much value it can add to your property in order to compare the building costs to the potential value gain. Well, as long as you know what you’re doing, your house doesn’t necessarily have to be a money pit. So what are your options when talking about home extensions and what’s the associated value to be gained?

• Bathroom Extensions

Although you should have it in mind that bathroom extensions isn’t usually that cheap, but once done, it can increase the value of a standard UK house within the range of £12,000 to £15,000. Meanwhile the finishing cost of a bathroom can range from £2,500 to £7,000.

• Single or Double Storey Extensions

Single storey extensions are always huge when it comes to increasing the value of your home - giving about 4 to 7 percent increase. If it goes that far, then literally nothing beats a full spectrum, double storey extension which can give up to 11 percent increase in the value of a property - equalling about a whooping £33,000 for a standard home in the UK.

• Conservatory Extension

With conservatories becoming more and more popular in the UK due to the weather conditions, several buyers are now including it’s availability as part of the criteria for purchasing a house. Wonder why? This is simply because everyone wants to enjoy their garden all throughout the year. As a result of this high demand, adding this type of extension to your house can go a long way to increase it’s value. However, it’s very important to incorporate high quality materials during construction. With glass conservatories offering, on the average, up to £5,000 increase in value, the cheaper PVC alternative offers much less value and can also deter potential buyers.

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